A process used to make ammonia from nitrogen and hydrogen
The Haber Process is a reversible reaction. Nitrogen and hydrogen are reacted under a high temperature and high pressure (and an iron catalyst) to form ammonia. If the reaction chamber is made hotter the process happens quicker but it forms less ammonia (lower yield) Also, more ammonia is formed if the process is done under a higher pressure. As a result, the chamber is held at 200 atmospheres of pressure and 450 degrees Celsius as this represents a compromise to these factors.